Narrow bands of lake-effect snow are expected beginning early Sunday in Jefferson, Lewis and Oswego counties, according to the National Weather Service.

Total snow accumulation is expected to be between six and 12 inches in the hardest-hit areas, and Tug Hill could get 15 inches.

The lake-effect snow warning is in effect between 4 a.m. Sunday until 7 a.m. Monday in those areas.

The most snow is expected across southern Jefferson County, northern Oswego County and western Lewis County.

The snow could produce very low visibility and deep snow on roads, creating difficult conditions, the weather service warned. Drivers should be prepared for rapid changes in road conditions due to the relatively narrow snow bands.